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B和C对Li-N-H络合氢化物储氢性能的影响
  • 期刊名称:无机材料学报,(已被录用)
  • 时间:0
  • 分类:TK91[动力工程及工程热物理]
  • 作者机构:[1]广西大学物理科学与工程技术学院,教育部有色金属材料及其加工新技术重点实验室,南宁530004
  • 相关基金:国家自然科学基金(50861003);广西自然科学基金(桂科自0728028);广西大学科研重点(2004ZD04);广西教育厅科研项目(桂教科研[2006]26-8)
  • 相关项目:稀土-镁基储氢合金/电极微结构与循环稳定性及失效机理研究
中文摘要:

利用机械合金化方法制备了Li-N-H络合氢化物,并研究B、C作为催化剂对其储氢性能的影响.结果表明:LiNH2、Li2NH为Li-N-H络合氢化物的主要储氢相,随B的加入,储氢相的非晶化程度提高.虽然B、C的添加均使储氢量下降,但n(B)∶n(C)=1∶2的混合添加提高了有效储氢量,同时也提高吸放氢动力学性能;B的添加可有效降低可逆吸放氢温度,适当增加球磨时间,有利于提高可逆吸放氢量.

英文摘要:

Li-N-H complex hydrides were prepared by mechanical alloying and the effects of B and C as catalyst on hydrogen storage properties were investigated.The results show that LiNH2 and Li2NH are the main phases in Li-N-H complex hydrides and the amorphous degree of the main phases increase with B element added.Although the hydrogen storage capacity decrease with B and C element added,the effective hydrogen storage capacity increase and the kinetic properties of hydrogen absorption/desorption can be improved when the adding n(B)∶n(C)=1∶2.The hydrogen absorption/desorption temperature can be decreased effectively with adding B.The reversible hydrogen absorption/desorption capacity can also be improved with milling time prolonging.

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